Fuel return bypass ?
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Instructor
Joined: Jun 2008
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Fuel return bypass ?
I recently bought a holley 110gph fuel pump to go with my 750 holley. The problem is that the holley only has 2 fuel line port and the facotry has 3. I know that plugging it up might cause vapor lock. But as i read up on it, it seems that there should be two fuel lines going to the carb a feeder line and a return line but my holley only has one line going to it. so how do i bypass the return line to install the new fuel pump?
Team Owner
Joined: Aug 2006
Posts: 24,125
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From: Columbia Missouri
I recently bought a holley 110gph fuel pump to go with my 750 holley. The problem is that the holley only has 2 fuel line port and the facotry has 3. I know that plugging it up might cause vapor lock. But as i read up on it, it seems that there should be two fuel lines going to the carb a feeder line and a return line but my holley only has one line going to it. so how do i bypass the return line to install the new fuel pump?
In reference to the line running from the fuel pump to the carb, use a 'T' and run a smaller diameter line from that back to the tank using the factory return line on the frame.
Race Director
Joined: May 2006
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From: Dayton, Ohio
Below is a link to several threads where the return T is described.http://forums.corvetteforum.com/sear...archid=8843587
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
You can build an outstanding fuel system by using the Mallory return-style regulator and running the return fuel right back through the stock return line. This will keep pressure under control, and will virtually eliminate vapor lock by keeping cool fuel circulating through the inlet fuel line log to your Holley. Here is a return system I just finished showing the feed and return lines to the carb:
Pro
Joined: Feb 2006
Posts: 718
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From: Jacksonville , NC
You can build an outstanding fuel system by using the Mallory return-style regulator and running the return fuel right back through the stock return line. This will keep pressure under control, and will virtually eliminate vapor lock by keeping cool fuel circulating through the inlet fuel line log to your Holley. Here is a return system I just finished showing the feed and return lines to the carb:
Just beautiful.
Race Director
Joined: May 2006
Posts: 16,528
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From: Dayton, Ohio
Do an advanced search-put in the key words "fuel return line"
In the user name put "Lars"
Down at the bottom click "archive"
Then go over to the right and select "C-3 corvettes 68-82"
Then click "submit reply"
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Race Director
Joined: May 2006
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From: Dayton, Ohio
Your looking at the return and it looks like he is using the reg. to regulate the return.
Last edited by ...Roger...; Jul 7, 2008 at 06:42 PM.
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
Last edited by lars; Jul 7, 2008 at 11:45 PM.
